High severity · published Jun 9, 2026
CVE-2026-24349
A vulnerability has been identified in SIMATIC WinCC Unified PC Runtime V16 (All versions), SIMATIC WinCC Unified PC Runtime V17 (All versions), SIMATIC WinCC Unified PC Runtime…
7.1
CVSS
0.1%
EPSS
No
On KEV
Description
A vulnerability has been identified in SIMATIC WinCC Unified PC Runtime V16 (All versions), SIMATIC WinCC Unified PC Runtime V17 (All versions), SIMATIC WinCC Unified PC Runtime V18 (All versions), SIMATIC WinCC Unified PC Runtime V19 (All versions), SIMATIC WinCC Unified PC Runtime V20 (All versions), SIMATIC WinCC Unified PC Runtime V21 (All versions < V21 Update 2). Insufficient protection of key material in WinCC Certificate Manager that could allow an attacker to extract sensitive information.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 0% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SW
SIMATIC WinCC Unified PC Runtime V16 · Siemens
0 · source: vendor
SW
SIMATIC WinCC Unified PC Runtime V17 · Siemens
0 · source: vendor
SW
SIMATIC WinCC Unified PC Runtime V18 · Siemens
0 · source: vendor
SW
SIMATIC WinCC Unified PC Runtime V19 · Siemens
0 · source: vendor
SW
SIMATIC WinCC Unified PC Runtime V20 · Siemens
0 · source: vendor
SW
SIMATIC WinCC Unified PC Runtime V21 · Siemens
before V21 Update 2 · source: vendor
SW
Simatic Wincc Unified PC Runtime · Siemens
16 through 20; 21; 21 · source: NVD
In the news
VulnerabilityHigh
Siemens WinCC Certificate Manager
View CSAF
Summary
WinCC Certificate Manager insufficiently protects key material that could allow an attacker to extract sensitive information. Siemens has released a new version for SIMATIC WinCC Unified PC Runtime V21 and recommends to update to the latest version. Siemens recommends specific countermeasures for products where fixes are not, or not yet available.
The following versions of Siemens WinCC Certificate Manager are affected:
SIMATIC WinCC Unified PC Runtime V16 vers:all/*
SIMATIC WinCC Unified PC Runtime V17 vers:all/*
SIMATIC WinCC Unified PC Runtime V18 vers:all/*
SIMATIC WinCC Unified PC Runtime V19 vers:all/*
SIMATIC WinCC Unified PC Runtime V20 vers:all/*
SIMATIC WinCC Unified PC Runtime V21 vers:intdot/<21.0.2
CVSS
Vendor
Equipment
Vulnerabilities
v3 7.1
Siemens
Siemens WinCC Certificate Manager
Cleartext Storage in a File or on Disk
Background
Critical Infrastructure Sectors: Critical Manufacturing, Transportation Systems, Energy, Healthcare and Public Health, Financial Services, Government Services and Facilities
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Germany
Vulnerabilities
Expand All +
CVE-2026-24349
Insufficient protection of key material in WinCC Certificate Manager that could allow an attacker to extract sensitive information.
View CVE Details
Affected Products
Siemens WinCC Cer...
Jun 23, 2026·CISA Advisories
Affected product
SW
SIMATIC WinCC Unified PC Runtime V16
Siemens
